Question # 1

At room temperature, the vapour pressure of water and ether will be

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equal

different

zero

almost same

Which of the following is a reason why real gases do not behave as ideal gases do?

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real gases have intermolecular forces between the molecules

real gases do not have intermolecular forces between the molecules

real gases exist as molecules

molecules of real gases attract each other more strongly than molecules of ideal gases

In the formation of NaCl crystals from its aqueous solution, its cubic shape is changed to needle like when 10% urea is present as impurity, this phenomenon is called as

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habit of crystal

polymorphism

anisotropy

cleavage

Fourth structure of protein structure refers to

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Proteins formed of more than one monomer

Myoglobin is an example

Depends on covalent bonds

None of these

Metals are good conductor of electricity, but their conductivity decreases by increase in temperature because

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electrons attracted strongly by the nuclei which resists their free motion

atoms form ionic bond and no free electrons

electrons go to the iocalized orbital not free

positive metal ions begin to oscillate and their motion hinders the free movement of electrons

Keratin is

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Protein of tendons

Rich in sulfur

Poor in cysteine

Conjugated protein

Only those metals can replace Hydrogen from dilute acids, which have

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High negative reduction potential

Low negative reduction potential

High positive reduction potential

low positive reduction potential

During the electrolysis of Fused NaCI, the products are

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Na and H2

Na and Cl2

Na and O2

H2 and Cl2

Which of the following is incorrect for glucose & sucrose

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Both are water solube

Natural polymers

Source of energy

Carbohydrate in nature

An alkyl halide reacts with NH3 to give

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Amide

Cyanide

Amine

Aniline

Enzymes consist of

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proteins only

proteins and non-protein parts

fats only

futs and non-fatty components

Soft drinks and baby feeding bottles are generally made up of

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Polyester

Polyurethane

Polyurea

Polystyrene

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Temperature is increased

Pressure is increased

HCl is added

HCl is removed

Vinyl acetylene combines with HCI to form

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Poly acetylene

Benzene

Chloroprene

Divinylacetylene

The actual number of atoms or molecules taking part in rate determining step is

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Rate of reaction

Velocity of reaction

Order of reaction

Molecularly

S_N1 reaction of alkylhalides leads to

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Retention of configuration

Recemisation

Inversion of configuration

None of these

Water H₂O is liquid while hydrogen sulphide H₂S is a gas beause

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphure has high electronegativity than oxyhe

Water molecules associate through hydrogen bonding

Number of sigma bonds in P₄O₁₀is

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6

7

17

16

A nuclophile must

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Be an atom

A group of atoms

Have a lone pair

Be negatively charged

Heavy water is obtained by

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Prolonged electrolysis of water

Dissolving heavy salt in water

Simple distillation of water

Removing impurities of calcium and magnesium form water

X-ray work has shown that the diameters of atom are of the order of

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8 x 10^-10m

2 x 10^-10m

8 x 10^-8m

2 x 10^-8m

The electronic configuration of an atom/ion can be defined by the following

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Aufbau principle

Pauli's exclusion principle

Hund's Rule

All the above

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